Cold-storage door.



G. F. SUNDLING.

COLD STORAGE DOOR.

APPLlCATlON FILED OCT. 26. 1914.

rammed Apr. 25,1916.

w" a! K! THE COLUMB'IA PLANOURAPH co., WASHINGTON, n. c.

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GUSTAF F. SUNDLING, OF SPOKANE, WASHINGTON.

COLD-STORAGE DOOR.

Specification of Letters Patent.

Patented Apr. 25, 1816.

Application filed October 26, 1914. Serial No. 868,744.

To all whom it may concern Be it known that I, G'os'rar F. SUNDLING,

a citizen of the United States, residing at Spokane, in the county of Spokane, State of lVashington, have invented certain new and useful Improvements in Cold Storage Doors; and I do hereby declare the follow ing to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in doors, and particularly to doors for cold storage rooms.

The principal object of the invention is to provide a simple and efficient door for closing the opening above the main door of the cold storage room and through which the elevated carrier track extends.

Another object is to provide such a device that the carrier which runs on the track can readily open the doors from either side of the main door and which doors will automatically close after the carrier has passed either in or out.

Other objects and advantages of the invention will be apparent from the following description when taken in connection with the accompanying drawing.

In the drawing: Figure 1 is a front elevation of my invention, the doors being in closed position. Fig. 2 is a similar view showing the doors partly open and the carrier in the act of passing through the doors. Fig. 3 is a top plan view of the doors in the position shown in Fig. 1. Fig. 4 is a top plan view of the doors in the position shown in Fig. 2. Fig. 5 is a vertical sectional view on the line 55 of Fig. 1. Fig. 6 is an ele vation of one of the doors viewed from within the cold storage room.

Referring particularly to the accompanying drawing, 10 represents the wall of a cold storage room in which is formed a doorway 11 having the usual entrance door 12. Above this doorway there is formed a vertical opening 13 through which extends the track 14 on which travels the carrier 15. This carrier is of ordinary construction and has the curved pulleys 16 engaging on the track and the hook 17 from which the articles for cold storage are suspended. Behind the wall 10, and at each side of the opening 13, is a door 18 which is adapted to slide back and forth over the opening. In the extent.

wall opposite each of the doors 18 is an elongated slot 19 which receives the horizontal member 20 carried by the door 18 slidably therein. Each of the doors carries one of these members 20, but in different horizontal planes so that when the doors are in closed position one of said members will slide over the other one. Each of the doors is cut away, as at 21, to receive the projecting end of the member 20 of the opposite door therein, while each of the doors is cut away as at 22 below the members 20 so as to completely embrace the track 1%. A spring 23 has one of its ends secured to the rear end of the member 20 and its other end at a convenient point in rear of the door 18, this spring holding the door 18 yieldably in closed position. The outer end portions of the members 20 have the oppositely inclined faces 24 and 25, the former of which are disposed outwardly of the doorway while the latter are disposed in the cold storage room. Thus when the carrier is moved from the outside of the room toward the room, the carrier will enter between the inclined faces 24 pushing the doors 18 to one side, suiliciently to permit the carrier to pass into the cold storage room. After the carrier has passed into the room, the spring 23 will force the doors into closed position. It will, of course, be understood that the main door 12 must be opened to permit the article hanging from the hook to pass into the room, the opening 13 communicating with the doorway 11.

From the foregoing it will be seen that I have provided a simple and novel device of this character and one in which the carrier can be readily moved into or from the cold storage room without permitting the escape of cold air from the room or entrance of warm air from without to any appreciable The springs 23 insure a quick return of the doors into normal closed position.

What is claimed is:

The combination with the wall of a cold storage room having an opening through which an elevated carrier track extends. of a pair of spring-actuated sliding doors movable on the outer face of the wall into abutting relation over the opening, said wall having horizontal slots formed at opposite sides of the opening in different horizontal planes, and horizontally disposed flanges carried by the doors and movable in the said rier on the track from either side of the slots and arranged to overlap when the doors opening. 10 are in closed position, retaining means car In testimony whereof, I afiix my signaried by the flanges and engaging the inner ture, in the presence of two witnesses.

face of the Wall, said overlapping portions GUSTAF F. SUN DLING. of the flanges being oppositely beveled Witnesses: whereby the doors are capable of positive H. SAHLIN, opening movement when engaged by a car- LOUISE F RAHM.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

' Washington, D. G." 

